Question

factorise x(x-a) -y (y-a)​

Answer 1

Answer:

x+y=a

Step-by-step explanation:

1st solve brackets and we get

x2- xa-y2+ya=0

then took xa and ya to right hand side

x2 -y2 =xa- ya

acoording to identity a2-b2=(a-b)(a+b

(x-y)(x+y)= (x-y)a

cancel( x-y) on both side

we get ans x+y =a or x+y-a=0